Sorry, I've posted it in another forum branch earlier (there are a few details more in discussion) — my mistake: viewtopic.php?f=32&t=73402
Blender shuts down when right after ORBX exporting process is started.
I can provide my scene in PM if needed.
The scene itself contains pretty simple geometry, but a bit coomplex structure: many collections and parentings:
A. Windows 10 Pro
B. GeForce RTX 2070 SUPER
C. 32 Gb RAM
D. NVIDIA Studio Driver 441.28
F. v. 20.6